caa a22 4500 465792782 CHVBK 20180323112029.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.2307/1351791 doi (NATIONALLICENCE)springer-10.2307/1351791 Spatio-temporal fluctuations in the distribution and abundance of demersal fish and epibenthic crustaceans in Yaquina Bay, Oregon [Elektronische Daten] [Waldemar De Ben, William Clothier, George Ditsworth, Donald Baumgartner] A total of over 32,000 demersal fish and epibenthic crustaceans belonging to 62 species were caught in 42 biweekly trawls from 10 stations in Yaquina Bay, Oregon, during 1967 and 1968. English sole,Parophrys vetulus, was the most abundant species. Seventeen species (13 fishes and 4 crustaceans) constituted 95% of the catch. Total numerical abundances of both individuals (mainly juvenile fishes) and species were greatest in the lower 12 km of the estuary during summer and early fall, a period of water mass stability and increased water temperature and salinity. This section of the estuary is used by many immature fishes and crustaceans as a "nursery area”. These fishes generally emigrate from the estuary as subadults in the fall around the onset of the rainy season. The fewest species were taken in January 1968 from the central, upper-estuarine, and riverine areas of the bay, this being a time when high rainfall and river discharge result in low salinity and temperature. Crustaceans (shrimp and subadult crabs) were generally most abundant in late winter and early spring throughout the estuary. Changes in diversity indices reflected variations in community structure, the influence of migratory species and juvenile fishes, and seasonal changes in dominance. Year-to-year fluctuations in abundance may be due, in part, to local hydrographic and meteorological conditions along the central Oregon coast. Estuarine Research Federation, 1990 De Ben Waldemar Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut Clothier William Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut Ditsworth George Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut Baumgartner Donald Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut Estuaries Springer-Verlag 13/4(1990-12-01), 469-478 0160-8347 13:4<469 1990 13 12237 https://doi.org/10.2307/1351791 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.2307/1351791 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Ben Waldemar Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut NATIONALLICENCE 700 1- Clothier William Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut NATIONALLICENCE 700 1- Ditsworth George Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut NATIONALLICENCE 700 1- Baumgartner Donald Environmental Research Laboratory Hatfield Marine Science Center Pacific Ecosystems Branch, United States Environmental Protection Agency, 97365, Newport, Oregon aut NATIONALLICENCE 773 0- Estuaries Springer-Verlag 13/4(1990-12-01), 469-478 0160-8347 13:4<469 1990 13 12237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer